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Species Diversity (Density) <br />A full accounting of all plant species encountered within each of the areas sampled for <br />cover was compiled. In addition, cover data were used to calculate fhe species density <br />(mean number of species present per unit area) of each sampled area. <br />Species presence was noted within the area one meter to either side of the transect (50 <br />m x 2 m = 100 mZ). These presence data along with point-intercept data were used to <br />produce values for species density expressed on a per-100 sq.m. basis. <br />Species Nomenclature <br />Scientific names used fallow Weber and Wittman (1996), common names cited are <br />found in Beetle (1970), Nickerson et al. (1976), or Soil Conservation Service (1979). <br />Cross reference to the substantially revised scientific nomenclature for the flora of <br />Western Colorado, as set forth by Weber and Wittman (2001), may be determined by <br />reference to Weber and Wittman (1992). <br />During the course of the fieldwork, a list of all encountered plant species (quantitative <br />plus incidental observations) was compiled for each reclamation area and the reference <br />area. These lists are summarized in Appendix 2, Table 12, Species Present - <br />Reclaimed and Reference Areas, which includes current nomenclature and cross <br />references to older nomenclature. <br />RESULTS AND DISCUSSION <br />Cover <br />Total herbaceous vegetation cover in the reference area samples averaged 52.3 <br />percent. The performance standard would be 90 percent of the approved reference <br />area mean and hence 47.1 percent (= 52.3 x 0.9). Parcels 003, HG8 and E all <br />exceeded this level (Table 9). In the slump area, total herbaceous vegetation cover <br />averaged 42 percent. Hence total herbaceous vegetation cover in the slump area did <br />not reach the standard for herbaceous cover set by the reference area. <br />3 <br />